Periodic inspection and test
Periodic inspection and test shall be in accordance with 18.104.22.168.
NOTE 1: With the agreement of the competent authority of the country that issued the type
approval, the hydraulic pressure test of each welded steel cylinder intended for the carriage of gases
of UN No. 1965, hydrocarbon gas mixture liquefied, n.o.s., with a capacity below 6.5 l may be
replaced by another test ensuring an equivalent level of safety.
NOTE2: For seamless steel cylinders and tubes the check of 22.214.171.124.1 (b) and the hydraulic
pressure test of 126.96.36.199.1 (d) may be replaced by a procedure conforming to EN ISO 16148:2016 "Gas
cylinders – Refillable seamless steel gas cylinders and tubes – Acoustic emission examination (AT)
and follow-up ultrasonic examination (UT) for periodic inspection and testing".
NOTE3: The check of 188.8.131.52.1 (b) and the hydraulic pressure test of 184.108.40.206.1 (d) may be replaced
by ultrasonic examination carried out in accordance with EN 1802:2002 for seamless aluminium
alloy gas cylinders and in accordance with EN 1968:2002 + A1:2005 for seamless steel gas cylinders.
Closed cryogenic receptacles shall be subject to periodic inspections and tests in accordance with the
periodicity defined in packing instruction P203 (8) (b) of 220.127.116.11, in accordance with the following:
(a) Check of the external condition of the receptacle and verification of the equipment and the
(b) The leakproofness test.
Approval of pressure receptacles
The procedures for conformity assessment and periodic inspection of section 1.8.7 shall be performed
by the relevant body according to the following table.
Type approval (18.104.22.168)
Supervision of manufacture (22.214.171.124)
Xa or IS
Initial inspection and tests (126.96.36.199)
Xa or IS
Periodic inspection (188.8.131.52)
Xa or Xb or IS
For refillable pressure receptacles, the conformity assessment of valves and other demountable
accessories having a direct safety function may be carried out separately from the receptacles and the
conformity assessment procedure shall be at least as stringent as that undergone by the pressure
receptacle to which they are fitted.
Xa means the competent authority, its delegate or inspection body conforming to 184.108.40.206, 220.127.116.11,
18.104.22.168 and 22.214.171.124 and accredited according to EN ISO/IEC 17020:2012 (except clause 8.1.3) type A.
Xb means inspection body conforming to 126.96.36.199, 188.8.131.52, 184.108.40.206 and 220.127.116.11 and accredited according
to EN ISO/IEC 17020:2012 (except clause 8.1.3) type B.
IS means an in-house inspection service of the applicant under the surveillance of an inspection body
conforming to 18.104.22.168, 22.214.171.124, 126.96.36.199 and 188.8.131.52 and accredited according to EN ISO/IEC
17020:2012 (except clause 8.1.3) type A. The in-house inspection service shall be independent from
design process, manufacturing operations, repair and maintenance.
If the country of approval is not a Contracting Party to ADR, the competent authority mentioned in
184.108.40.206.2 shall be the competent authority of a Contracting Party to ADR.
Requirements for manufacturers
The relevant requirements of 1.8.7 shall be met.
Requirements for inspection bodies
The requirements of 1.8.6 shall be met.
Marking of refillable pressure receptacles
Marking shall be in accordance with sub-section 220.127.116.11 with the following variations.
The United Nations packaging symbol specified in 18.104.22.168.2 (a) and the provisions of 22.214.171.124.4 (q) and
(r) shall not be applied.
The requirements of 126.96.36.199.3 (j) shall be replaced by the following:
(j) The water capacity of the pressure receptacle in litres followed by the letter "L". In the case of
pressure receptacles for liquefied gases the water capacity in litres shall be expressed to three
significant figures rounded down to the last digit. If the value of the minimum or nominal water
capacity is an integer, the figures after the decimal point may be neglected.
The marks specified in 188.8.131.52.3 (g) and (h) and 184.108.40.206.4 (m) are not required for pressure receptacles
for UN No. 1965 hydrocarbon gas mixture, liquefied, n.o.s.
When marking the date required by 220.127.116.11.7 (c), the month need not be indicated for gases for which
the interval between periodic inspections is 10 years or more (see packing instructions P200 and P203